Preventive Maintenance; Pump Storage; Long-Term Inactivity; Method For Filling Pump With Anti-Corrosion Emulsion Or Anti-Freeze Solution - Pratissoli MF7M Serie Manual De Uso Y Mantenimiento

11

PREVENTIVE MAINTENANCE

For pump reliability and efficiency, comply with maintenance
intervals as shown in the table of Fig. 9.
Many applications will require changes at the frequency
shown in the table due to severe and unusual operating
conditions.
PREVENTIVE MAINTENANCE
Every 100 hours
Check oil level
If the pump is temporarily not going to be
used, in order to prevent stiffening or corrosion
caused by the fluids being pumped, it is strongly
recommended to flush all the components inside
the head.
To increase the component life of hydraulic parts,
wash the parts with fresh water at the end of the
working day
12

PUMP STORAGE

12.1

Long-term inactivity

If the pump is started for the first time after a long
period from the date of shipment, before operation
check the oil level, inspect the valves as specified
in chapter 10, then follow described start-up
procedures.
12.2 Method for filling pump with anti-corrosion
emulsion or anti-freeze solution
a) Make sure the connecting pipe is clean.
b) Fix the suction pipe to the diaphragm pump, open the
pump suction connection and attach the pipe between it
and the diaphragm pump.
c) Fill the container with solution / emulsion.
d) Insert the free ends of the suction pipe and the high
pressure exhaust pipe inside the container.
e) Switch on the diaphragm pump.
f ) Pump the emulsion until it exits from the high pressure
exhaust pipe.
g) Continue pumping for at least another minute.
The emulsion can be strengthened if necessary by adding
Shell Donax for example to the solution.
h) Stop the pump, remove the pipe from the suction
connection and close with a plug.
i) Remove the hose from the high pressure exhaust. Clean
and grease and plug both pipe connections.
Every 300 - 500 hours
Change oil
Check / Replace:
Balls
Valve seats
for MF7M5B and MF7M7B
Check / Replace:
Valves
Valve seats
Valve springs
Valve guides
for MF7M5D and MF7M7D
Check / Replace:
H.P. seal
Wiper ring
Fig. 9
13

PRECAUTIONS AGAINST FROST

Follow the instructions in Chapter 12 in areas and
times of the year at risk of frost (see par. 12.2).
In the presence of ice, do not start the pump
for any reason until the circuit has been fully
defrosted, in order to avoid serious damage to
the pump.
14

WARRANTY CONDITIONS

The guarantee period and conditions are contained in the
purchase agreement.
The guarantee will in any case be invalidated if:
a) The pump is used for purposes other than the agreed
purposes.
b) The pump is driven by an electric motor or internal
combustion engine having performance values exceeding
those shown in the table.
c) The safety devices provided are uncalibrated or
disconnected.
d) The pump has been used with accessories or spare parts
not supplied by Interpump Group.
e) Damage has been caused by:
1) improper use
2) failure to follow maintenance instructions
3) any use different from that described in the operating
instructions
4) lack of sufficient flow rate (suction)
5) defective installation
6) improper positioning or sizing of pipes
7) unauthorized design modifications
8) cavitation.
15 OPERATING FAULTS AND THEIR
POSSIBLE CAUSES
The pump does not prime upon start-up:
- The pump is not primed and is running dry, rpm
too high - see graph in par. 9.8.
- No suction bentonite.
- Valves are jammed.
- The outlet line is closed and does not allow the
release of air present in the pump manifold.
Pump pulsates irregularly:
- Air suction.
- Insufficient supply.
- Bends, elbows, fittings on the suction line are
choking the passage of liquid.
- The pump is not primed for insufficient head.
- The pump is not primed due to valve jamming.
- Worn valves.
- Worn pressure seals.
- Imperfect functioning of the pressure control
valve.
- Problems on the transmission.
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